Immunity

Improving immune function can be accomplished with natural components from yeast cell extracts known as beta-1,3-glucans. The herbal compounds echinacea, goldenseal, and astragalus have all been documented to improve T-cell and immune functions, but studies have shown that echinacea diminishes in effectivenes if taken daily over a long period of time. It is better to take this herb for two or three weeks and then put it aside for a week of two. Reishi mushroom extract and shiitake mushroom concentrate are well-known immune stimulants as well.